A teacher polled only the 8th grade students in English classrooms on what their favorite color is. She found that the favorite color of the school is blue. What kind of sample is this?

This is a biased sample.

Step-by-step explanation:

This is because she gave a random sample, but the she had the convenience of the students being with her when she surveyed. So it'e not actually random. She could also worded the survey or gave a biased response.